Book excerpt: It's the middle of the night, but try as hard as he might, Christopher can't sleep. He keeps hearing a noise thundering through the house: HONK SHOO! Could it be an elephant trumpeting outside his window? Or a bear in his closet? Maybe it's a dinosaur stomping down the street? Christopher gathers up all his courage, and readers follow close behind as he tiptoes down the hall to find out where or what the noise is coming from